Yes, there are two F-111 squadrons, but only one of these is an operational unit (1SQN), while the other is a conversion unit (6SQN). The last of the G models were retired as of last week, leaving 21 C models, of which only six to eight are allocated to 6SQN according to operational requirements.Also some food for though regarding the F-35B's.
Some of you think that there will be fewer F-35A's to fill the airforce squadrons..
Lets look at the F-111 fleet..
We currently operate 26 F-111's. Half of which are usually not operational. Best case we have 16 or so F-111's operational. Thats about right for a single squadron... But wait... We have TWO F-111 squadrons thats only 8 operational aircraft per squadron!!
So much for our 24 aircraft per squadron idea.
Lets look at our F/A-18 Fleet.
We have 71 aircraft. 17 of two seat trainers and 51 single seat combat aircraft.
Now we have three squadrons which would seem right but then we also have a training/conversion unit which uses the two seaters shared with Number 3 and 77 squadrons are Williamstown. As most squadrons include a couple two seaters that gives us only 17-18 combat aircraft per squadron.
So much for out 24 aircraft squadron idea.
If we reduce the squadron size to 20 aircraft that is much more realistic. 5 squadrons of 20 brings up 100 aircraft in total. Looking at squadron sizes of the F-111 i believe that the reliability of the F-35's will be so good that we could use 16 aircraft squadrons. That gives us 5 squadrons of 16 aircraft to replace the two F-111 and two F/A-18 hornet squadrons. That brings a total of only 80 F-35 aircraft.
A 6th additional suqadron of 16 aircraft could consist of F-35B's. 16 would be a perfect size of F-35B's. 8 F-35's could be rotated onto one of the three LHD's.
There are three operational Hornet squadrons (3, 75 and 77), and one conversion unit (2OCU). There are 71 Hornets left in service, 16 of which are two-seat B models, and 55 single seat A models, however due to the ongoing HUG program and R3 maintenance program, the squadrons are operating at their minimum numbers of about 10 to 12 airframes on line. Don't forget also, the B model is fully combat capable, albeit with about eight percent less range.
Whereas Hornet tail numbers and markings have previously been assigned to units in the past, these are now all mixed across the fleet as they complete their HUG 2.2 upgrades and are re-allocated, e.g. 77SQN, the first all HUG 2.2 unit currently has tail markings from all four units allocated to it. So Basically, an operational pool of jets is controlled by 81WG, and these are allocated ad hoc to units to meet their respective operational, exercise, or training commitments.
The 100 JSF numbers comes from what is thought to be an optimum number of airframes required, allowing for attrition and maintenance requirements, to maintain four operational and two conversion units, just as 75 Hornets and 24 F-111s were originally thought to be sufficient in the 70s. However, due to the unreliability of the F-111s during the 80s and the impending digital AUP in the 90s, an additional 15 F-111Gs were acquired so as to keep "sufficient airframes in the carports" as the CO of 6SQN said in a recent article. Now that the C models has been given a definite retirement date (June 30, 2010), the Gs which are almost all due for some deep maintenance, can instead be drawn down with confidence.
The F-35 and F/A-18F are expected to be far more reliable than the aircraft they replace; for example, the F/A-18F in USN service currently requires about 12 maintenance man hours per flight hour (MMH/FH) while at sea on a carrier to keep flying, whereas the F-14 often needed more than 100! If the F-35 does end up replacing the F/A-18F around 2021, it is unlikely we'll require two OCUs. Therefore, the ultimate number of F-35s acquired may end up being closer to 80 rather than the 100 currently specified, whilst still being able to maintain the desired number of aircraft on the ramp and squadrons.
And just on the F-35B, although I wouldn't bet my life on it, I'm very confident it'll NEVER be acquired for the ADF, as neither the RAAF nor the RAN want them, and you'd be hard pressed to find anyone in uniform to recommend them to the Minister in the near future. The LHDs are going to be troop, helicopter and landing craft carriers - that's it!
Cheers
Magoo